Hybrid excitation three-phase brushless synchronous generator based on full wave induction excitation

Abstract

The invention discloses a hybrid excitation three-phase brushless synchronous generator based on full wave induction excitation. The direction, magnitude and cycle of a current applied to a stator excitation winding change, the direction of a built induction excitation magnetic field changes with the rotation of a rotor magnetic pole, so that an induction current is generated on a rotor winding and can be maintained in the same direction all the time, and the rotor induction winding generates magnetic potential which is the same as or opposite to that of a permanent magnet, the magnetic potential and the magnetic potential of the permanent magnet are in a parallel connection relation in an air gap, and the air gap magnetic field is bidirectionally adjusted by adjustment of the excitation magnetic potential to achieve parallel connection hybrid excitation. According to the hybrid excitation three-phase brushless synchronous generator, the induction magnetic potential is generated in the rotor winding according to a double-pole induction principle, the induction magnetic potential and the permanent magnet in the rotor jointly generate the air gap magnetic field, and the adjustment of the magnetic field of the motor is achieved. Through an induction excitation effect, a brush-slip ring system is omitted, and with the application of a stator excitation regulator, the rotor induction current becomes controllable full-wave current.

Description

Technical field [0001] The invention relates to a hybrid excitation three-phase brushless synchronous generator based on full-wave induction excitation. Background technique [0002] With the continuous improvement of the performance of permanent magnet materials and the decrease in cost, permanent magnet synchronous motors have attracted more and more attention because of their simple structure and reliable operation, especially their high efficiency that other motors can’t match. However, due to the nature of the permanent magnet itself, when the load causes the armature current to change or the speed changes, the permanent magnet generator cannot adjust the excitation magnetomotive force by adjusting the excitation current like an ordinary electric excitation generator, which affects the normal operation of the load. . [0003] How to realize the effective regulation and control of the air gap magnetic field has always been a hot and difficult point in the research of permanent...

AI Technical Summary

Problems solved by technology

However, due to the nature of the permanent magnet itself, when the load causes the armature current to change or the speed to change, the permanent magnet generator cannot adjust the excitation magnetomotive force by adjusting the excitation current like ordinary electric excitation generators, which affects the normal operation of the load.

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